Fan Speed Control For Indoor Unit - Daikin RMXS-L Series Service Manual

SiUS181631EA
7.3

Fan Speed Control for Indoor Unit

Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH.
The airflow rate can be automatically controlled depending on the difference between the room
thermistor temperature and the target temperature.
Automatic Fan In automatic fan speed control, the step SL is not available.
Speed Control
LLL
LL
L
ML
M
MH
H
HH (POWERFUL)
Cooling
The following drawings explain the principle of fan speed control for cooling.
CTXS-J, CTXS-H Series
CTXG, CTXS-L, FTXS-L, CDXS, FDXS, FVXS Series
*For CTXG, CTXS-L, FTXS-L, and FVXS series, the upper limit is M tap in 30 minutes from the
operation start.
Heating
In heating operation, the fan speed is regulated according to the indoor heat exchanger
temperature and the difference between the room thermistor temperature and the target
temperature.
Note: The fan stops during defrost operation.
Functions and Control
CTXS-J, CTXS-H series
Step Cooling
= The airflow rate is automatically controlled within this range when FAN button is set to
automatic.
Fan speed
+1.5˚C (+2.7˚F)
+0.5˚C (+0.9˚F)
Fan speed
+2.5˚C (+4.5˚F)
+1.5˚C (+2.7˚F)
+0.5˚C (+0.9˚F)
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions
Heating
(R6834)
(R6833)
Room thermistor temperature – target temperature
M
+2˚C (+3.6˚F)
ML
+1˚C (+1.8˚F)
L
Room thermistor temperature – target temperature
MH*
+3˚C (+5.4˚F)
M
+2˚C (+3.6˚F)
ML
+1˚C (+1.8˚F)
L
CTXG, CTXS-L, FTXS-L, CDXS, FDXS,
FVXS series
Cooling Heating
(R11681)
(R17357)
(R6834)
(R16967)
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